/**
 * @license
 * Copyright 2016 Google Inc.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

export function makeRandomUint64Array(
  length: number,
  numPossibleValues: number,
) {
  const possibleValues = new Uint32Array(numPossibleValues * 2);
  crypto.getRandomValues(possibleValues);
  const data = new Uint32Array(length * 2);
  for (let i = 0; i < length; ++i) {
    const index = Math.floor(Math.random() * numPossibleValues);
    data[i * 2] = possibleValues[index * 2];
    data[i * 2 + 1] = possibleValues[index * 2 + 1];
  }
  return data;
}

export function makeRandomUint32Array(
  length: number,
  numPossibleValues: number,
) {
  const possibleValues = new Uint32Array(numPossibleValues);
  crypto.getRandomValues(possibleValues);
  const data = new Uint32Array(length);
  for (let i = 0; i < length; ++i) {
    const index = Math.floor(Math.random() * numPossibleValues);
    data[i] = possibleValues[index];
  }
  return data;
}
